Given that viral nucleic acids (DNA and/or RNA) and in particular viral dsRNA are key pathogen-associated molecular patterns (PAMPs) activating PRRs upon infection with various viruses, we investigated by indirect immunofluorescence, using the mouse monoclonal K1 antibody directed against dsRNA, the presence of such a type of nucleic acid in MVMp-infected cells. This evidence concerns the gene KRT1 and infection.